Designing Pitch Controller for Large Wind Turbines via LMI Techniques

This paper proposes a design of robust LMI-based collective pitch controllers (CPC) for large wind turbines operating above their rated wind speeds. The proposed controller design takes into account model uncertainties by designing a controller based on a polytopic model. The LMI-based approach allo...

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Bibliographic Details
Published in:Energy procedia 2011, Vol.12, p.808-818
Main Authors: Hassan, H.M., Farag, W.A., Shawkey, M., ElShafei, Abdel Latif
Format: Article
Language:English
Subjects:
individual blade pitch
LMI
Pitch control
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Summary:This paper proposes a design of robust LMI-based collective pitch controllers (CPC) for large wind turbines operating above their rated wind speeds. The proposed controller design takes into account model uncertainties by designing a controller based on a polytopic model. The LMI-based approach allows additional constraints to be included in the design (e.g. H∞ problem, H2 problem, H2/H∞ trade-off criteria, and pole clustering).These constrains are exploited to include requirements for perfect regulation, efficient disturbance rejection, and permissible actuator usage. The proposed controller is combined with individual pitch controller (IPC) that reduces the periodic blade's load by alleviating once per revolution (1P) frequency fatigue loads.
ISSN:1876-6102
1876-6102
DOI:10.1016/j.egypro.2011.10.107